/* * Copyright (c) International Business Machines Corp., 2006 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * Calculate CRC32 with UBI start value (0xFFFFFFFF) for a given binary image. * * Author: Oliver Lohmann */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <getopt.h> #include <unistd.h> #include <mtd/ubi-media.h> #include "crc32.h" #include "common.h" #define BUFSIZE 4096 #define PROGRAM_VERSION "1.0" #define PROGRAM_NAME "ubicrc32" static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION " - a tool to calculate CRC32 with UBI start value (0xFFFFFFFF)"; static const char *optionsstr = "-h, --help print help message\n" "-V, --version print program version"; static const char *usage = "Usage: " PROGRAM_NAME " <file to calculate CRC32 for> [-h] [--help]"; static const struct option long_options[] = { { .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' }, { .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' }, { NULL, 0, NULL, 0}, }; static int parse_opt(int argc, char * const argv[]) { while (1) { int key; key = getopt_long(argc, argv, "hV", long_options, NULL); if (key == -1) break; switch (key) { case 'h': fprintf(stderr, "%s\n\n", doc); fprintf(stderr, "%s\n\n", usage); fprintf(stderr, "%s\n", optionsstr); exit(EXIT_SUCCESS); case 'V': fprintf(stderr, "%s\n", PROGRAM_VERSION); exit(EXIT_SUCCESS); case ':': return errmsg("parameter is missing"); default: fprintf(stderr, "Use -h for help\n"); return -1; } } return 0; } int main(int argc, char * const argv[]) { int err = 0; uint32_t crc = UBI_CRC32_INIT; char buf[BUFSIZE]; FILE *fp; if (argc > 1) { fp = fopen(argv[1], "r"); if (!fp) return sys_errmsg("cannot open \"%s\"", argv[1]); } else fp = stdin; err = parse_opt(argc, argv); if (err) return err; while (!feof(fp)) { size_t read; read = fread(buf, 1, BUFSIZE, fp); if (ferror(fp)) { sys_errmsg("cannot read input file"); err = -1; goto out_close; } crc = crc32(crc, buf, read); } printf("0x%08x\n", crc); out_close: if (fp != stdin) fclose(fp); return err; }